From: Patrick McHardy <kaber@trash.net>
To: Stephen Hemminger <shemminger@osdl.org>
Cc: bridge@osdl.org, nfs@lists.sourceforge.net,
Chris Rankin <rankincj@yahoo.com>
Subject: Re: [Bridge] Re: No UDP NFS over bridges in Linux 2.6.16.x?
Date: Mon, 17 Apr 2006 20:00:34 +0200 [thread overview]
Message-ID: <4443D7C2.7030901@trash.net> (raw)
In-Reply-To: <44408207.1070404@osdl.org>
Stephen Hemminger wrote:
> Then get a packet trace of a failing session with tcpdump. You may need
> to get two, one
> one the client and one on the server to be able to see which packet
> isn't getting past the
> bridge.
I only saw half of this thread (Chris' mails haven't made it to the list
yet), but in case you're using bridge-netfilter and conntrack, its most
likely because of conntrack fragmentation changes in 2.6.16. Conntrack
defragments packets, but relies on the IP layer to do the
refragmentation now. With purely bridged traffic, the packets don't go
through the IP layer, so they exceed the MTU of the outgoing bridge
port. 2.6.16.6 will include a fix for this problem:
[patch 06/22] NETFILTER: Fix fragmentation issues with bridge netfilter
WARNING: multiple messages have this Message-ID (diff)
From: Patrick McHardy <kaber@trash.net>
To: Stephen Hemminger <shemminger@osdl.org>
Cc: Chris Rankin <rankincj@yahoo.com>,
nfs@lists.sourceforge.net, bridge@osdl.org
Subject: Re: [Bridge] Re: No UDP NFS over bridges in Linux 2.6.16.x?
Date: Mon, 17 Apr 2006 20:00:34 +0200 [thread overview]
Message-ID: <4443D7C2.7030901@trash.net> (raw)
In-Reply-To: <44408207.1070404@osdl.org>
Stephen Hemminger wrote:
> Then get a packet trace of a failing session with tcpdump. You may need
> to get two, one
> one the client and one on the server to be able to see which packet
> isn't getting past the
> bridge.
I only saw half of this thread (Chris' mails haven't made it to the list
yet), but in case you're using bridge-netfilter and conntrack, its most
likely because of conntrack fragmentation changes in 2.6.16. Conntrack
defragments packets, but relies on the IP layer to do the
refragmentation now. With purely bridged traffic, the packets don't go
through the IP layer, so they exceed the MTU of the outgoing bridge
port. 2.6.16.6 will include a fix for this problem:
[patch 06/22] NETFILTER: Fix fragmentation issues with bridge netfilter
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next prev parent reply other threads:[~2006-04-17 18:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-14 13:42 [Bridge] No UDP NFS over bridges in Linux 2.6.16.x? Chris Rankin
2006-04-14 13:42 ` Chris Rankin
2006-04-14 16:40 ` [Bridge] " Stephen Hemminger
2006-04-14 16:40 ` Stephen Hemminger
2006-04-14 19:26 ` Chris Rankin
2006-04-14 20:53 ` [Bridge] " Stephen Hemminger
2006-04-14 20:53 ` Stephen Hemminger
2006-04-14 20:58 ` Chris Rankin
2006-04-14 21:00 ` [Bridge] " Stephen Hemminger
2006-04-14 21:00 ` Stephen Hemminger
2006-04-14 22:13 ` Chris Rankin
2006-04-14 22:17 ` [Bridge] " Stephen Hemminger
2006-04-14 22:17 ` Stephen Hemminger
2006-04-14 23:50 ` Chris Rankin
2006-04-15 5:17 ` [Bridge] " Stephen Hemminger
2006-04-15 5:17 ` Stephen Hemminger
2006-04-17 18:00 ` Patrick McHardy [this message]
2006-04-17 18:00 ` [Bridge] " Patrick McHardy
2006-04-17 18:17 ` Chris Rankin
2006-04-17 18:24 ` Patrick McHardy
2006-04-17 18:24 ` Patrick McHardy
2006-04-17 22:09 ` Chris Rankin
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